Machine for sawing timbers



June 24, 1930.

G. s.' MARION MACHINE FOR SAWING TIIIBERS Filed July 25. 1927 ssheets-sheet i June 24, 1930.

G. S. MARION MACHINE FOR SAWIiG TIIIIIBERS Filed ,July '23, 192'?- ssneets-sn'eet 2 June 24,1930.

a. s. MARION MACHINE FOR SAWING TIMBERS 6 Sheets-Sheet 3 Filed July 25,1927 June 24, 1930. G,' s, ARION I 1,765357 IACHINE FORJSAWING TIIBERSFiled July 23. 1927 6 Shasta-Sheet 4 June 24, 1930. G ARION 1,765,987

MACHINE FOR SAWING TIMBERS Filed July 2s.- 1927 6 Sheets-Sheet 5 June24, I930. G. s. MARION MACHINE FOR SAWING TIMBERS Filed July 23, 1927 6SheetS-Sheet 6 Patented June 24, 1 930 fr 7 i GARDNER'S. MARION, orooiveo en, MASSACHUSETTS, ASSIGNORTO Portia com-Ln COMPANY, orCHELSEA,"IiIAfiSACHUSETTS; A; C.ORPOBATIQ N OF MASSACHUSETTS lIYILA GHIN'E roe SAWrZNG winn ng Application ,fi1ea July 23,

' Thepresent invention" relates to'machines for sawing timbers and isherein disclosed as embodied in a machine for sawing roof rafters.

' One object of the invention istto produce a machine Which will operateautomatically to saw timbers accurately, rapidly, and efli- 'ciently. toany, one ofa large variety; of shapes an'dsizes as required for building110 and similar purposes, More specifically its object is to produce amachine for" sawing roof rafters which willfoperate automatically toycutthe endsfof andi notches in raft ers in rapid successionand" in exactduplig .115 cation to fit accuratelyf withoutflfurther alteration intothe b g. Scheme for which they-aredesig d 1 I I r r V v of the inventionconsist in the devices, com- .20 binations and arrangement of partshereinafter describedandclaimed.

,The several features "o'fthe invention togetherwith the advantagesgtobe "obtained v thereby will be clearly understood by those 5,2skilled in theartfron-if the-following de-J.

seription taken in a connection the accompanying drawings, in which Flg.1 1s a view in front elevation of one embodiment of the invention in amachine for sawing 1,30 roof rafters; Fig.j2'is aviewl in transverseverticalsection on the line"2j2'of Fig. 3 Fig. 3 is "apl-an view of themachine Fig; lis an enlarged View in vertical section of aportion of oneof"- the'endless chains and the 35 work clamps attached thereto'comprising the travelling work support, takenEon the.

line of Fig. '3 at the receiving end of the' 'work' support; Fig-1,1515:a similar'vlew showing the work" clamp discharging the- .49 finishedrafter 'atthe rear' end o f -the ma- Fig; 6 i's a detailed;- view infront elevation offthe'partsshown {in Fig. 4:; 7 is' a I l detailed viewin front elevation ofgthe rotary 4? saw for cutting the upper ends oftherafters planview' of -the parts shown Fig. 7 p.50 Fig'ilO is a rearelevation iofjthe saws for 1927. Serial No, 207,886."

notching and cutting'the lower ends of] the rafters,together with theirmountings; Fig.

11 is a-vieW of. one ofthe rotary saws with its mounting for cutting thelower rends of the rafters, the View being taken along the axis ofthebearing from the rear; Fig. 12 V 1s a- ,slmilar view of thebearingsfor the rotary .saw cutting the side of the notch parallelto the ends ofthe rafter; and Fig.

13 is a perspective view of a finished rafter fqb and also the angularnotch near the eaves I end of the rafter to receive the plate or otherWith these objects. in'view the features Support 'fo rthe rafter. Themachine cornprises a travelling worksupport and four rotary sawsadjustably mountedto cut the ends of and notch the rafters at thedesired 1 r angles and distances as'the raftersare' fed past the saws."The travelling Work support. consistsof two endless chains adapted tofeeding the work to the saws, runways are provided which hold the clampsjrigidlyin the line of feed while therafters are being fed to the saws;"I

" Referring more specifically to the drawings, the" machinecomprisesa-broad rec- 1 t ngulair frame 14, consisting of two front;'members' 15, one rear member l6, andltwo i end members 17. 1011' theframe are lillQllnt v ed two parallelendless chains18 andY19 for feedngithe timbers across the top of the j machinezpast the saws. The chainsrun on .icllerfspro'cket wheels 20 and are "driven at the same rate ofspeed'from the'd-riving shaft I i 22 atthe rear of the machine throughsprock et1whe els23 and 25 mounted onthe driving shaft; v -Afrotary saw24 for cutting the h lower ends of'the rafters and 'therotary saws f 25:j a and also facilitates the castingof ofthe lin-,

. .ished rafterat the end of the eperation; T f the rear end ofthe'basev '40 is secured *braclietA6 which carries two rollers A8 30jWhile feedi theY-ehain, the c ontact of ,the' rollers f p lg'tvithitheguid'etvaysifir 'To soinefextent thejvork gicarrier i is also heldrigidly p07. sition -by the contact ofthe'rolls 58jof'.tlie

t. elainping' leversfO withftheiguidewvays 38 26 28 adapted to notch therafters to 7' receive the Wall plate of the house area-ll adjustablymounted on brackets Whichare sleeved to a fixed'sup'port 30, formed inthe machine frame. A siniilar saWBQ isprovided for cutting the upperends of the rafters this saw and-also the endless chain 18 being mountedon acarriage 34C foradjustment transversely to the'line'of feed-todetermine 'the length of rafteritobecutj 1 Thetimbers are-securely heldin position:

on edge as they are fpresented to the saws by 11163118 of Work carriers36 Which arefastened at correspondingfintervals to the. [chains 18 and19. "To further insure the "requisite degree of accuracy. in feeding theWork, guideways 38 are mounted on both sides of: the chains so that thecarriers are ,t rigidly positioned in the line of feed as; the

V v v t IThe Work carr ers compr sea base -10.

which isfastened. atlZ to the chaln "and: a

{back'support {t lilsecurejd at right angles 130 Work is fed past-thesaws. I r

the base. The front "end" of: the b ase" is bent down so that'it issupported on-tlie chain adapted/to ride in the guideways -8 na serves,as a'pivot for the parallel clai' 'iping l levers 50,; Theinovable jawof the clamp r r by vvhichth'e work issecurelyheld on edge inthefcarrier comprises a block 52 which is and carries axspring pressed}plunger iac'lapted to engage the timber. 'lworods 55 secured totheenlarged head ofthe plunger I 5 1 land adapted to slide in correspondingI plunger with relation to the block 52 and the' sharpened' lower endsextending beloW fthe face pf the plunger prevent any slipping of thematerial held in. the clamp. Two

the guide'ways 38-.l The clamping jaWsof the carrierimay beadjusted toaccommodate materially larger t mber wh ch could not be'talren'care ofby the yield in the spring zpressed V-plunger 54% by securing the block52 to the li'nlrs'fi through the eyelets 59 formed in theflen'ds ofjthelinksfCr this'fpurposei spring tlO'stret'ched between the block and i''7 l a point on thevertical back support i l tends gto 'hOld the blockdepressediiii clamping .p'o-

'sitiorL p 7 f-lumber to V the-sans the worki carrier is supported. atone pointby tact with, the V rafter placed in the buniper,

slidably mountedfon the backsupporte holes in the'lblock '52V serveht0,guidethe parallelilinks 56 connectthe bleclr52 tethet ,7 clamping levers50 which carryfon their; 7 other sends the rolls-58 adaptecl to engagein since the parts of the clamp when in clamping position With a rafterin the jawsof the clamp tend to support each other and prevent forwardor backward movement of the clamp, The chain is held taut to form a firmsupport for the clamp by placing the e driving sprocket Wheel at the endof its ork feeding travel at the rear end of the machine and further bytheuseof tensioning-devices of ordinary construction; on the l lower or}slack side of the chain. The timbers-are automatically 'fed to themachine ",froma bumper or receptacle formed on the front ,of themachmewhmh f comprisesjtwjo curved bands 62 mounted on the machine frameeach vbeing provided with a -verticalback rest 64 to position therafters placed inthebuinper iwith relation to the V J clamping devices.To further assistinposi- -tioning the rafters anend plate 66'is providedfor the bumpersecuredfonthe ma'chine T V frame. a 7

Just before the Work carriers mounted on theendlesschains l8 and 19 comelnto coni the rear ends ofthe clamping levers 50 are depressed toopenthe' clamping jaws by means of springs,;68 which are mounted on afixed bracket and adapted to 1 come into eontact with the rolls.-

As the clamping devices V V 7,95 are carr edover the sprocketwheels onto7 j a horizontal plane therollsilz8fland 58 Willi engage intheguideWa-ys 38causingtheblock.

52 tobe. depressed to clamp the rafter firmly 100:,

on the Work carriere As 'the carrierspass over the sprocket heels'j23,and Qlfi fatthe rearofthe machinetheitipping of the clamp} if Willcausethe clampingglevers =again to be depressed relatively totheclarnptorelease v I "The rotary saw; for cutting the lower7 ends oftheraftersis'adjustably moiintedon i V thejiinished rafter as illustratedin Fig. 5

a bracket 72fto cutthe lower ends ,of I the rafters'at the desiredanglewhic-hwillcorrei spend to the 'pitehof'the roof and ill be";parallel to the} cuts made-"by the saws 28 and 32. Thesaw 2'ismountedona shaft '74 w i h n rb a g -76, timomiteciror adjustmentlengthwise of theishaftgin'bloclrs i =78 Wlnehare -initurn mounted foradjust-J ment. transversely eftheshaft in ajvertical angular adjustmentO, hels ilvr with relation tiQlL bygme'ansgof set screw; 80; "An*afddi+plane-by means of bolt and slot connections "w th thebracketjZQ. .Thebracket 72I'is sleeved on the fixed support 30 to permit i Q t 12ctojthe workla'nd is-held adjustablyin-posif the fixed support 30and'heldadjustably in the desired angular position by means of set screws 90 and92. I Q I The rotary saws 24, 26 and 28} are' all driven from thedriving shaft 94 by 'a' belt 96 which runs on a pulley 98; on thedriving saw. shaft 74 bya belt 102' running on pulleys 104 and 106, andthe saw 26 is similarly I bracket 116 is further supported by means isdriven from thedriving shalt 94 by a 1 1 menttransversely to the line offeed comdriven from the shaft of saw 28 by a belt The rotary saw 32for'cutting the upperv ends of the rafters is similarly mounted foradjustment illustrated as in Figs. 7 and 9 to cut the rafters, at theexact-angle required to fit into the building scheme -forlwhich they aredesigned.' The rotary saw is mounted on a shaft 11O1which'turns inbearings 112 one at each end of theshaft the bearings being mounted foradjustment lengthwise of the shaft. in blocks 114, and the blocks beingin turn mounted for adjustment transversely of the shaft in a verticalplane by means of bolt and slot connections with the bracket 1164 Inorder to secure the desired 118 mounted on. the carriage 34 andis heldadjustably in position by a set screw. The

of a rod 120 hinged on the carriage 34 and two nuts 122 and 124 threadedonto the rod to bear against thebracket 116.; The saw belt 123 whichruns one pulley 125splined to the driving shaftand a pulley 127 on thesaw shaft 110.

Thecarri-age 34 which supports the rotary saw 32 and the endless chain18 for adjustprises a supporting bracket'for these parts and is providedwith rollers adapted to run' on guideways 126, 128 and 130 formed in Lthe frame of. the machine. The carriage may're'adily be moved to adjustthe saw 32 other end apinion 136 which engages a sprocketchain138 f astenedto the frame ofv the machine.

h To glock. the1carria ge34 adjusted I position, a handilever14O1ispivoted'at 142 I tothe carriage andv connected'by means of links144 and 146 to two small rollers 148 i and 150 so thatwhen the handlever 140 ismoved to the rig'ht the rollers will be drawn together,riding under oppositely 1I1Cl111l portions of the carriage. 34 to;l1ft'1t off the guideway. Atthesame-"time, hook shaped brake member 154secured; to the carriage will be brought into contact with the -flangedunder sides of the .guidewaysto lock the carriage. in position.Thedriving sprocket wheel23 of the endless chain 18 is: splined sideswith supporting bearings 152 for the A p drivingshaft which aresecured-to the carshaft anda pulley on. the shaft 7 4 of saw 24. The saw28 is in turndriven from the.

riage" 34. When adjusting the. position of the carriage the drivingpulley for the saw 32 and the adjacent supporting bearing 156 which isadjustably secured by afboltf I andslot connection l58'in the machineframe adjusted "position of the carriage.

The operation of the machine 1s"as"fol lows: Two corresponding workcarriers rid g "on the endless'cha1ns18 and 19 will havetheir.clampingjaws opened by the cone tact of the cam surface 68 with-the clamp- -mustbe moved along and again secured in 7 position at a point'c'orrespondingwith the mg levers .50 as they approach the loading bumper to rece ve anuncut rafter ,placed the influence of the springs 68', permitting thejaws to contact with the-rafter under the influencelof the light spring6O. Then as the carriers pass "around the sprocket '3 wheels 20 onto ahorizontal plane, the rollers '48 and 58. entering'the guidewayswill p0-sition "the carriers rigidly inthe-line of feed and actingthrough theclamping levers will depress the clamping jaws still further totakeflupthe yield inf-the spring pressedplunger 54 so that the'rafterisheld rigidly positionedinthe carrier." The rafter is now carried pastthe saws which are adjusted first to cut simultaneously the ends of the5 1 timber at the desired angle and then to make firstione and'then theother cutof the'notch.

Preferably the saws and carriers are so arranged and spaced that inregular operatlon of the machine, two saws Wlll always be cutting ifirst the end cutting saws on the; same rafter, and then the notchingsaws on v I 7 Thus a steady and uniform load is provided, enabling themachine different rafters.

to operate with a minimum of power and at maximum speed. As thecarriers-ride over theQdriving sprocket wheels atj the. rear of themachine,the clamps are opened permitting the finished rafterstoslide'off onto. a

chute or other appropriate receptacle while the carriers return torepeat the cycle.

iio v 'Although theinvention is herein disclosed 1 i as embodied in amachine for sawingroof rafters, certain features of the invention-are iof more general application to machines for "'automaticaly sawing anyrelatively J heavy and unwieldy timbers to fitwithout. H :furtlieralteration'into the building schemes for'wliichthey are "intended. Theork is handledea'sily, rapidly, and with a degree 5 of accuracy notobtainable by present meth One embodimentofthe invention ina machine forsawing roof rafters having been described and illustrated; What isclaimed is: l v 1, Ainacliine forsawingroof rafters hairing, inconbination, rotary saws for shaping Y the lower ends and noteliing therafters, a saw for shaping the upper ends of'theraffers, a continuouslytravelling workvsupport for feeding the rafters horizontally atspacedinteryalgfla carriage for the -latier [saw adjustable to determinethe length of e e the rafters, and lneansrforclamping the car; r g' ri yin" pQe t qn' somp ns e i r clined face ongthe carriage andcooperatmg'rolls for engaging the same. i V

'2. v A machine for sawing roof rafters having, in combination; acontinuously traveljling WOIk suppert' fo'r feeding the rafters V j horzontally, tlpp ng mountlngs, rotary saws carried thereby to cut, thelower ends and notch the rafters at theldesired angle, means I foradjusting the saws on the mountings 25 lengthwise of at rightsangles totheir 7 ,respectlve axes, andjefn additional sawqad justably"lnountedtocut the upper ends of f the rafters at the desired length and angle. 1;3'. A machine forfsawing roof rafters Q 6 haying;in combination, aeontinuously trair 1 I s e I V I e .elling Work support for 'f eedlngthe rafters e 7 i f V, horizontally at spaced'intervals',three saws 5 1spaced to operate consecutively onthe same rafter, andeonnnon means,providing for A angular adjustments of the three saws. I e In testimonywhereof have signed iny name to this specification.

GARDNER sQMARIoN,

